The benefits of quitting smoking—reduced risk of cancer and many other health problems—are known. But for millions of smokers, t

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问题     The benefits of quitting smoking—reduced risk of cancer and many other health problems—are known. But for millions of smokers, the【D1】______effect of a cigarette can be reason enough to start up again.
    Studies have found, however, that in reality, lighting up has the【D2】______effect, causing long-term stress levels to rise, not fall. For those dependent on smoking, the only stress it【D3】______is the withdrawal between cigarettes.
    In a recent study【D4】______at the London School of Medicine and Dentistry, researchers looked at 469 people who tried to quit after being【D5】______for heart disease. At the start, the subjects had similar levels of stress and generally believed that smoking helped them to cope. A year later, 41% had managed to stay abstinent(节制的). After controlling for many a【D6】______, the scientists found that the abstainers had "a【D7】______larger decrease in perceived stress," roughly a 20% drop, compared with the continuing smokers, who showed little change.
    The scientists’【D8】______was that the continuing smokers were dealing with uncomfortable cravings(渴望)between cigarettes multiple times a day, while the abstainers, after facing some initial withdrawal, had greater freedom from nicotine cravings and thus had【D9】______a frequent and significant source of stress. Other studies have also found that smokers experience higher levels of stress and【D10】______between cigarettes and lower levels over all when they quit.
A)relieves F)suffered K)conducted
B)summary G)factor L)hypothesis
C)calming H)eliminated M)negative
D)tension I)opposite N)hospitalized
E)significantly J)causes O)dominantly
【D9】

选项

答案H

解析 根据句子结构可知,此处应使用动词的过去分词构成过去完成时。由前半句可知,“持续吸烟的人每天处理那种想吸烟的不舒服的欲望很多次。”while表示转折,则推测戒烟者会有相反的行为结果,也就是他们“消除了这种频繁而巨大的压力来源”,故eliminated符合句意。
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